Extension table



M. FOX

EXTENSION TABLE Oct. 14, 1930.-

Filed Aug. 9, 192 2 Sheets-Sheet l M. FOX

EXTENSION TABLE Oct. 14, 1930.

Filed Aug- 9. 1923 2 Sheets-Sheet 2 31wantoc Patented Oct. 14, 1930 i E-D STATES PATENT orrics MARTIN FOX, OF CHICAGO, ILLINOIS, ASSIGNOR TO THE SENG COMPANY, OF

CHICAGO,

ILLINOIS EXTENSION TABLE Application filed August 9, 1928. Serial No..298,593.

to provide I an arrangement particularly adapted for heavy tables and in which the main section is in twoseparable parts with the section or leaf to provide the extension housed below said separable parts when the latter are joined in the closed position of the table.

This invention therefore contemplates in particular the construction of a large or heavy table with a top divided in two parts or sections that may be separated and the area thereof readily increased by an extra section or leaf moved vertically into position between the main sections, the mechanism for accomplishing the purpose being somewhat similar in construction and operation to the mechanism for housing leaves under the oppositesides of a solid top and moving them in line'at opposite sides thereof as shown and described in the application hereinabove referred to, in that instance the solid main section or top being raised and lowered whereas in the present form of my invention the top is in two sections and the vertical movement is imparted to the housed section or leaf requiring a modification in the form and operation of the associated track-plates by which the desired motion is imparted to the-extra section or leaf with respect to thehorizontal slidable movement of the two sections of the to I l Vith the above objects in view my invention consists more especially in the particu-' lar construction of the companion trackplates whereby to impart an upward movement of the extra section or leaf when the horizontally slidable sections of the top are separated i ad at a dewev sl m mentof a solid top when the extension leaves are extended horizontally as provided in the case of a solid top; all as hereinafter fully described and more particularly set forth in the appended claims.

In the accompanying drawings:

Figure 1 is a sectional view of an extension table in closed position with the operating mechanism shown in elevation.

Fig. 2 isa similar view with the parts or sections extended.

Fig. 3 is an elevation looking at the opposite side of the supporting rail and showing the guiding means for the movable sections.

Fig. 4 is a sectional view through the extension table showing the operating mechanism in position for bringing the sections into co-planar relation.

Fig. 5 is a detailed view of one of the metal slides attached to the top section of the table.

Fig. 6 shows sectional views through said metal rail.

Fig. 7 is a detailed view of the main trackplate employed in raising and lowering the extra section'or leaf of the table top.

7 Fig. 8 is a detailed view of the slidable tracleplate.

Fig. 9 is a view showing the track-plates conn cted and attached to the metal slide.

Fig. 10 is a view looking at the inner side of the connected track-plates, and

Fig. 11 is a transverse sectional view through the center of the table on the line 11-1.1 of Fig. 4.

In the accompanying drawings I have shown on so much of an extension table as will ilhis e the application of my invention in conne..1ion with a rail for supporting the twopart top. extension leaf, and devices for raising and lowering said extension or extra section of the top, it being understood that in practice the arrangement will be duplicated with respect to second rail and that said rails are supported on or a pedestal according to the style of table de sired, and that also in this embodiment of my invention the construction and arrangement of the track-plates forming the principal eiements of the mechanism or metal parts for raising and lOWSlil the extra section or leaf m E; a

in cooperation with the longitudinally slidable top-sections may be modified or changed in accomplishing the required operation in view of the modif ed form.

Referring to the b eral construction of the extension table as ill strated in the drav-rin s, the horizontal ra r 15 is provided at opposite sides thereof with longitudinal grooves 16 along which travel the inturned lower of metal slides 17 and 18 attached to the underside wooden filling pieces 10 beneath the separable top-sections 20, 2.0 at the outer ends thereof withi the apron 21, said filling pieces as well as the correspondii'ig extensions 19 of the rail to support the inner ends of the top sections when 0 ended being of approximately the same tl ickness as the vertically mova le center-section or leaf which latter is housed beneath the top-sections between the filling pieces in the closed. position of the table as shown in Fig. 1 and the sections of the two-part top are slidablc horizontally on the rail and til v piece 19 to receive said vertically movable center-section or leaf in between them, one of the meetin edges in each instance being provided with pins fitting into holes in the other meeting edge to provide an even joint as usual in table construction.

For the purpose of having the horizontally movable top sections move in unison, and more especially to provide that the mani nilation of one or said sections wid also slide the other section the meta slides l? and 18 are provided with rack teeth 23 at their inturned edges which are in mesh with a gear-wheel 22st let into the center portion of rail 15. metal plates 25 being attached to the opposite sides of said rail and engaging the metal slides respectively to lold them in close contact with the rail and gear-wheel, and the extra top-section or leaf is guided in its perpendicular movement by means of toggle levers 26 and 27 pivoted together centrally and at their ends pivoted to flanges of plates 28 and 2f secured to the underside of the leaf and rail with the said flanges 28 and 29 extending towards each other and provided with slots ill to accommodate the movement of the toggle levers which operate after the manner of lazy ton The vertically movable leaf or centc .:.-tection of the table top is supported by oepending member or bracket plate Ell aha-tired to the underside thereof and provid x end with an inwarly projec a which is a roller tra cling in i: in track-plates carried by one 0 slides, said track-plates forming the priucipa elements constituting my prc' ent invention whereby to impart to the top-section or leaf the required vertical movement for cooperation with the extension or separation of the main top-sections to receive said extra topsection or leaf in between them and housed below them; in other words in the presentinstance the mechanism hewinattr-r described provides for raising the extra top-section or leaf when the main top-sections are separated suxlicient to receive the same, and to lower said extra top-section or leaf preliminary to closin the main top-sections together.

In carryin out the present adaptation of my invention relating to improvements in extension tables of this particular type the t 'ack-plate 34: which is attached to the metal slides, as 17, of one of the main top sections by screws 35 is provided near its lower edge with a horizontal slot 36 having an inclined extension 37 at one end thereof communicating with the central portion of an upper horizontal slot 38 forming trackways over which the roller at the lower end of the supporting member 31 travels and it will. be noted that when the roller is traveling along trackway of slot 36 during the separation of top sections 2-0 20 to such an extent to receive the leaf 22 in between them said leaf will remain in its lowered position, and that as the said top sections are further separated the center section or leaf will be raised as the roller travels over the trackway of the inclined slot 87 and n'iaintained in raised position by said roller traveling on the trackway of that portion of upper horizontal slot 38 beyond the inclined slot the full open movement of the table, as shown in Fig. 4, the closing of the top sections operating the movable track plate 39 to bridge the upper end of the inclined slot and provide a trackway over which the roller travels in bringing the top sections against the leaf which forms the extension of the top, it being noted that for the purpose of forming the bridging trackway on said auxiliary track-plate for this operation the latter is provided with a horizontal slot 40 in alignment with slot 38 in the main track-plate and against the opposite end walls or abutmerits 40 40 of which slot the roller strikes to shift said track-plate from one position to the other. The auxiliary track-plate is also provided with an inclined slot 41 adapted to be brought into alignment or register with the inclined slot 87 in the main track-plate for travel of the roller in lowering the leaf to housed position, with the lower portion of said auxiliary track-plate cut away as shown in Fig. 8 to not interfere with the movementof the roller along trackway of slot 36 as the main top sections are brought together with the leaf in lowered 0r housed position. The track-plates are connected for slidable movement of one upon the other as in the form of extension table disclosed in my co-pend ing' application, that is rivets 42 42 extend through holes &3 in one of said track-plates (Fi 7) and through slots l l in the other track-plate (Fig. 8) with spring plates 45 at oneend of the rivets to bear against the face of the adjoining track-plate to provide lit) 1,77e,eae

the required friction between the plates for maintaining the slidable track plate in the position to which it is shifted by the roller.

From the foregoing description of the construction of the track-plates the operation of raising and lowering the center leaf forming the extension of the table will be readily understood, for in the housed position of the leaf (Fig. 1) the roller on the lower end of the supporting member 31 is at the opposite end of slot 36 from the inclined slot 37, and as the main top sections are pulled apart, by manipulating either one of them, said roller travels along this slot until it reaches the inclined slots 37 and 41 which are in alignment at which time said main top sections are separated sui'liciently to receive the leaf in between them and on further separation of the top sections the roller travels up said inclined slots to bring the leaf on a plane with said top sections at which stage of the operation the latter are moved to their fullest extent 4) whereby track-plate 39 is shifted to the right by contact of roller with wall or abutment 40 to bridge slot 37 and permit said roller to travel thereover in bringing the top sections against the center leaf, this movement causing the roller to strike abutment 40 to return the slidable track-plate to normal position with slot 41 registering with slot 37 so that a slight separation only of the top sections 20 20 is required in lowering the center leaf by the roller entering theinclined slots for the purpose, and of course when said centerleaf is lowered the horizontal slot 36 provides that the said top sections can be brought together for closed position of the table with the center leaf below the same at thecenter of the table.

It will be noted that by providing the filling pieces-on the rail and top section, respectively, the filling pieces on the rail form supports for the inner ends of said top-sections in extended position of the same in addition to the support afforded. by the centering pins connecting the top sections and leaf.

I claim:

1. an extension table having a supporting; rail, top sections with slidescooperating with the rail. for horizontal movement of said sections and a leaf connected to the rail by toggle levers for vertical movement, of a, plate carried by one of the sections and cut away to provide a horizontal track, an inclined slot extending upwardly and outwardly from said track, a member movable on the plate at one side of said slot to open and close the same, means for moving said member by a movable part of the table, and an arm depending from the leaf and resting on the aforesaid track in closed position of the leaf and adapted to ride up the inclined slot and rest on the movable slot closing mem having horizontal movement to and from' each other and an extension leaf having a vertical movement to a central position coplanar with said sections and to a position below said sections, of a plate carried by one of the sections of the top and having a horizontal track with an inclined slot extending up wardly and outwardly from said track, a member movable onthe plate at one side thereof to open and close the upper end of said slot, means for yieldably holding said member in either position to which it is shifted, an arm depending from the leaf and resting on the aforesaid track in lowered position of said leaf and on the slot closing member in r ised position thereof, the slot closing member being operated by the leaf supporting arm.

3. In an extension table having a support for the top, a divided top comprising sections slidable horizontally on the support, and a vertically movable leaf and means for guid ing the same, of a plate carried by one of the sections and having a horizontal track with an inclined slot extending upwardly and outwardly therefrom terminating in a short horizontal track, an auxiliary plate slidable at one side of the aforesaid plate and having a track portion and slots corresponding with the first mentioned plate and adapted to register therewith, and an arm depending from the leaf to rest on the tracks and enter the slots when they are in alignment with each other, said arm operating the auxiliary plate to close the upper end of the inclinen slot and form a support for the arm.

4. In an extension table having a supporting rail, top sections with slides cooperating with the rail for horizontal movement of said sections, a leaf and means for guiding the same vertically, of a main plate carried by one of the sections and cut away to provide a horizontal track and an inclined slot extending upwardly and outwardly from said track, an auxiliary plate slidable at one side of the aforesaid plate and having a slot corresponding with the slot therein and adapted to register therewith, and an abutment on the last mentioned plate extending above the extension of the inclined slot in the main plate; together with an arm depending from the leaf to travel on the track and in the aforesaid slots, said arm engaging the abutment to move the slidable plate.

5. In an extension table having a supporting rail, top'sections with slides cooperating with the rail for horizontal movement of said sections, a leaf and means for guiding the same vertically, of a plate carried by one of the sections and cut away to provide a horizontal track, an inclined slot extending up- 'ardly from said track and a horizontal slotextending forwardly and rearwardly from the upper end of the inclined slot, an aux iliary plate slidabie at one side of the aforesaid plate and having an inclined slot and latter from one position to another with respect to registration the slots.

6. In an extension table having a supporting rail top sections with slides cooperating with the rail for horizontal movement of said sections, a leaf and means for guiding the same vertically, of a main plate carried by one of the sections and cut away to provide a horizontal track, an inclined slot extending upwardly and outwardly from said track and a horizontal slot extending forwardly and rearwardly from the upper end of the in clined slot, an auxiliary plate slidable at one side of the aforesaid plate and having an inclined slot and forward extension corresponding with the slots in said plate and adapted to be moved in and out of register therewith, means for pressing the plates yieldingly together for holding the slidable plate in either position. and spaced apart abutmcnts on the slidable plate extending above the slot at the upper end of the inclined slot in the main plate; together with an arm depending from the leaf to rest on the track and enter the slots when they are in alignment with each other, said arm being adapted to strike thahutments on the sliding; plate when shifting the same with respect to registration of the slots.

7. In an extension table having a supporting: rail. top sections with slides cooperating; with the rail for horizontal movement of said sections a leaf and means for guiding the same vertically, of a main plate carried by one of the sections and cutaway to provide a horizontal track with an inclined slot extending upwardly from one end thereof and terminating in a short horizontal track. a plate slidable at on side of the aforesaid plate and having a slot and tracks correspo iding with the slots and tracks therein and adapted to register therewith, means for mnnecting the slidable plates, springs for pressing the plates yieldingly together, and abutlnents at the ends of the slidable plate extending aoove said short track of the main plate; together with an arm depending from the leaf and supported by the plates.

8. In an extension table having a supporting rail, top sections with slides cooperating with the rail for horizontal movement of said sections, a vertically movable leaf and means for guidin the same, of a main plate carried by one of the sections and having a horizontal track with an inclined slot extending upwardly from one end thereof and terminating in short horizontal tracks extending: at opposite sides of the inclined slot, an auxiliary plate slidable at one side of the aforesaid plate and having an inclined, slot and forwardly extending track correspomling with the slot and track in said main plate and adapted to register therewith bolts extending through slots in the auxiliary plate and through holes in the companion plate, springs in said bolts for frictionally holding; said plates together; together with abutments on the auxiliary plate extending above the short tracks of the main plate, and an arm de 'iending from the leaf and resting: on the tracks to enter said slots when in alignment with each otheia said arm being adapt ed to strike the aforesaid abutments for shifting the auxiliary plate at the ends of the opening and closing movements; of the top sections of the table.

9. In an extension table having; a support. top sections movable horizontally of said support, a leaf vertically movab e on said support and means for guiding; the movement of the leaf, of a plate carried by one of the sections and having a track with slot extending upwardly therefrom, a, mem ber movable at one side of the plate to close the upper end of the slot, a supporting' arm de )ending from the leaf and movable on the track and in the slot of the plate, said supporting arm also ope 'ating to move the slot closing; member with respect to the slot.

10. In an extension table having hori zontally slidable top sections and a vertically n'iovable leaf mounted on a supporting frame for housing the leaf under the top sections, of metal parts constituting the mechanism for raising and lowering" the leaf on movement of the sections comprisine' a metal slide for attachment to the sections; a main plate carried by the slide and having a horizontal. track with an inclined slot at one end thereof extending upwardly and terminating in a short horizontal track. an auxiliarv plate slidable at one side of the main plate and having); track portions and an inclined slot adapted to register with the correspondiHgl track portions and slot of sahl main plat, with abutments at the ends of the auxilia y plate projecting above said short track of the main plate.

11. An extension table comprising a support, a divided top comprising sections slidable horizontally on the support, a vertical ly movable leaf and means for guiding the same; together with a track on one of the sections for moving the leaf to raised and lowered position with respect to the sections of the top, a member movable at one side of the track, and supporting means depending from the leaf and adapted to travel over the track and member in raising said leaf and supporting it raised.

12. An extension table comprising a support, top sections slidably mounted on said support for horizontal movement towards and away from each other, a vertically movable leaf adapted to align with said sections when in open position and to be housed beneath said sections when in closed position, cooperating means between said leaf and support for guiding said leaf in its movements, a track plate carried by one of said sections for raising and lowering the leaf, means on said leaf cooperating with the track of said plate in the raising and lowering of the leaf b movement of said sections and a member slidable at one side of said track to hold said leaf in its raised position.

13. An extension table comprising a support, top sections slidably mounted on said support for horizontal movement toward and away from each other, a vertically movable center leaf adapted to align with said sections when in open position and to be housed beneath said sections when in closed position, cooperating means between said leaf and sections for raising and lowering said. leaf; through the sliding movements of said sections, comprising a track secured to one of said sections having upper and lower horizontal trackways and an intermediate inclined trackway, a supporting member secured to said leaf and sliding on said tracks, the lower horizontal trackway being elongated for allowing said sections to fully open and the inclined trackway carrying said member and attached leaf upwardly upon further movement of said sections, and means operated by a still further movement of said sections for closing said inclined tra'ckway whereby said sections may be moved in in a horizontal plane in reverse direction towards each other to abut against said leaf in coplanar position with the supporting member traveling on the slot closing means.

7 MARTIN FOX. 

